geometry theroms Flashcards
Converse of the same side interior angles theorem
If two and a transversal form same side interior angles that are supplementary then two lines are parallel.
Converse of the corresponding angles postulate
If two lines and a transversal form corresponding angles that are congruent then the two lines are parallel.
Converse of the alternate exterior angles theorem
If two lines and a transversal form alternate exterior angles that are congruent then two lines are parallel.
Converse of the same side exterior angles theorem
If two lines and a transversal form same side exterior angles that are supplementary then two lines are parallel.
Multiple parallels theorem
If two lines are parallel to the same line then they are parallel to each other
Multiple perpendicular theorem
If two Copland lines are perpendicular to the same line then they are parallel to each other
Perpendicular transversal theorem
In a plane if a transversal is perpendicular to one of two parallel lines then it is also perpendicular to the other